Jefferson? Obama? Who knows for certain? We know what they said in public.No president will ever be an atheist.
They cannot be considered because prejudice against atheists prevent their election in the USA.None even considered
US atheists may often have to pay lip-service to religion in order to advance their careers. What a sad state of affairs for a supposedly secular country. Some people talk of aggressive secularists and militant atheists. The real problem is aggressive religionism. One cannot be politically "too secular". It is when religion is politicised the problems start.
"In God We Trust" (Der!:)